@@Hōkūleà-m5r yes. I actually found a free foldable bike that I removed the hinge and put it on one of my trikes. It works great, you just have to pay attention to the orientation of the hinge, so if the locking mechanism fails it won't fold onto itself mid ride.
@@bentBuilder Do you have a video on putting a hinge on a trike bike? I need my trike bike foldable to be able to put it in a car trunk when I get a ride.